Pumping power



July 23, 1940.

R. E. LEONARD ET AL 2 5 PUMPING POWER I Filed Dec. 27, 1938 3 Sheets-Sheet 1 INVENTOR: Roy E. LEO/YARD.

HAR K EAR/IV BY G 4' A TTORNEY.

y 23, R. E. LEONARD ET AL 2,208,590

PUMPING POWER Filed Dec. 27, 1958 {5 Sheets-Sheet 2 A TTORNEY.

July 23, 1 R. E. LEONARD ET AL PUMPING POWER Filed Dec. 27, 1938 3 SheetsSheet 15 IN VEN TOR. R0 Y E. LEO/YARD BY HA REY GEAR/A19- zzw/m A TTORNEY.

Patented July 23, 1940 UNITED STATES PUMPING POWER Roy E. Leonard, Alhambra, and Harry Gearing, Pasadena, Calif.; said Gearing assignor to said Leonard Application December 27, 1938, Serial No. 247,996

4 Claims.

This invention is a pumping power, particularly useful for operating one or more deep well reciprocating pumps, but useful also for other purposes, and it is an improvement upon Pumping power covered by United States Letters Patent No. 2,091,287, of August 31, 1937.

The general object of this invention is to provide a simplified and improved pumping power for effecting a long and slow stroke of the sucker rod of a deep well pump.

A more particular object is to provide a pumping power of the character stated which runs smoothly and is generally efficient and economical in operation. I

Other objects and advantages will appear hereinafter.

The invention is illustrated in the annexed drawings which form a part of this specification and in which:

Fig. 1 is a plan view of our invention.

Fig. 2 is a vertical section of our invention taken on line 22 of Fig. 1.

Fig. 3' is a transverse vertical section of our invention taken on line 3-3 of Fig. 1.

Fig. 4 is a vertical section taken on line 4-4 of Fig. 3, with the drive mechanism in position for the drive pinion to travel along the upper side of the reciprocative rack.

Fig. 5 is a horizontal section taken on line 5-5 of Fig. 4.

Fig. 6 is a horizontal section taken on line 6-6 of Fig. 3.

Fig. 7 is a vertical section taken on line 1-1 of Fig. 2. I

Fig. 8 is a fragmentary vertical section like Fig. 4, but showing the drive mechanism in position for the drive pinion to travel along the under side of the reciprocative rack. 7

Referring more particularly to the drawings, in which corresponding parts are designated by the same reference characters in all of the figures, our pumping power includes generally a horizontal reciprocative rack bar I, zormed with a double continuous rack 2 and a single rack 3, a drive pinion 4 in mesh with said continuous rack 2 for reciprocating said rack bar, driving mechanism 5 for said drive pinion, a horizontal pull drum 6 for pulling a plurality of pump-operating cables such as I, 8 and 9, and driving means II! for said pull drum compressing a vertical drive shaft I I, on the upper end of which is keyed said pull drum 6, and a horizontal drive gear I2 keyed on the lower portion of said drive shaft in mesh with said single rack 3, whereby said pull drum is oscillated by the rack bar I, through the medium of said rack 3, gear I2 and shaft II, in i the manner hereinafter more fully described. The double rack 2 extends along the lower side. around the ends and along the upper side of the rack bar I, while the single rack 3 extends along the rear side of said rack bar, the gear I2 in mesh with said single rack and the shaft II on which said gear is keyed being located at the rear of said rack bar I.

Arcuate pinion guides I3 and I4 are mounted on the ends respectively of the rack bar I our means of arms I5 and I6 which are formed integral with and. extend from the rear side at the ends of said guides, and are welded at their ends,

at I I, to the rear side of the rack bar I at the ends respectively of said rack bar, so that said guides extend around the ends respectively of the rack Z for guiding the pinion 4 around said ends. The guides I3 and I4 are tied together at their forward sides by tie rods I8, whereby said guides are reinforced to resist outward pressure against them of the pinion 4 while guided by said guides around the ends of the rack 2. The guides I3 and I4 are slidably mounted between a pair of I-beams I9 and 20, the lower sides of said guides resting upon the I-beam. I9 and the upper sides of said guides engaging the I-beam 20. The I-beam I9 rests at its ends upon mountings 2| which may rest upon any suitable base 22 for supporting our pumping power, while the I-beam 20 rests at its ends upon the upper ends of a pair of uprights 23 which are supported at their lower ends upon the I-beam I 9 at the ends of said I-beam.

A housing 24 for the rack bar driving mechanism 5 is secured to the front side of the I-beams l9 and 20, intermediate the ends of said I-beams, by bolts 25 and 26, which extend through said I-beams respectively and through the rear wall 21 of said housing, while a housing 28, enclosing the gear I2 and drive shaft I I for driving the pull drum 6, is secured to the rear side of said I-beams intermediate the ends of said beams by said bolts 25 and 26, which extend also through the front wall 29 of said housing 28, as shown in Fig. 3 of the drawings. The rock bar I and guides I3 and I4 are enclosed between the housing 24 and the ends of the I-beams I9 and 20, and between the housing 28 and the ends of said beams, by plates 30 and 3| secured to the front sides and to the rear sides respectively of said I-beams by bolts 32 and 33.

The driving mechanism 5 includes generally a power shaft 34, a pinion 35 secured on said power shaft, an idler gear 36 in mesh with'said pinion,

a floating idler shaft 31 on which said idler gear is rotatively mounted, a vertically reciprocative cross head 38, a drive shaft 39, journaled in bushings til fitted in bearings M in said cross head, on which shaft the drive pinion 4 is secured, and a drive gear 42 secured on said drive shaft 39, within the cross head 38, in mesh with said idler gear 36. The floating idler shaft 31 is secured at its ends in one end of a pair of links t3, the other end of which links being turnably mounted on the power shaft 34, and said idler shaft is turn ably fitted in one end of another pair of links 44, the other end of which links being turnably mounted on the inner ends of the bushings 40 respectively, between the inner ends of the bearings 4! respectively and the hub of the drive gear 42, the inner ends of said bushings extending beyond the inner ends of said bearings.

The cross head 38 is mounted to reciprocate vertically on two pairs of intermeshing pinions 45 and A3 in the lower end of the cross head and two pairs of intermeshing pinions ll and ii; in the upper end of the cross head, a pair of suitably spaced vertical racks $9, each in mesh with one pinion 45 and one pinion ll, and a pair of suitably spaced vertical racks 553, each in mesh with one pinion. t3 and one pinion 48, which racks 49 and 59 are formed on the inside of the housing 2 at opposite sides of the cross head 38. The two pinions 45 are secured in spaced relation, on a shaft 5| journaled in bearings 52 and the two pinions 45 are secured in spaced relation on a shaft 53 journaled in bearings 54 in the lower end of the cross head 38. The two pinions 4'! are secured, in spaced relation, on a shaft 55 journaled in bearings 5t, and the two pinions 43 are secured in spaced relation, on a shaft 5? journaled in bearings 58 in the upper end of the cross head 38. A pair of disk rollers 59 and 50 are turnably mounted on the pinion drive shaft 33, with the roller 55! positioned between the front side of the drive pinion I and a shoulder til on said drive shaft, and the roller 80 positioned between the rear side of said drive pinion and a head 52 on the rear end of said drive shaft 39, said rollers corresponding in diameter to the pitch diameter of the drive pinion 4 and rolling upon surfaces 63 and M respectively of the rack bar I at the sides of the rack 2 which is narrower than the rack bar, whereby-the teeth of said drive pinion are maintained in proper meshing relation with the teeth of said rack, so that said pinion and rack will not jam under heavy loads applied thereto, said rollers also being positioned to engage the guide faces and 66 respectively of the arcuate guides i3 and M to guide the drive pinion t around the ends of the rack 2 and maintain the teeth of said pinion in mesh with the teeth of said rack, while said pinion travels around the ends respectively of said rack.

The pull drum drive shaft If is journaled in bearings 6i and 63 formed respectively on the lower wall 69 and the upper wall iii of the housing 28, there being an end thrust bearing H mounted in the lower end of the lower bearing iii, upon which end thrust bearing rests the lower end of said drive shaft H and the weight of said drive shaft drive gear I2 and pull drum I5, which pull drum is keyed on the upper 'end portion of the drive shaft I I over the upper end of the upper bearing 63.

The pull drum 6 is formed in its periphery with a plurality of parallel grooves it, three of which receive the pump-operating cables l, 8 and 9, and additional cables may be received in any or all of said remaining grooves, for operating additional pumps. Said cables extend in said grooves arund the periphery of the pull drum 6 and are secured at one end to said drum, as at I3, the other ends (not shown) of said cables being connected to the elements to be reciprocated, such as the sucker rods, of deep well pumps.

Cables 14 and I5 are respectively connected, at 16 and TI, to the guides I3 and It, for respectively operating two pumps as the rack bar I is reciprocated, besides those operated by cables, wound on the pull drum 6.

The operation, uses and advantages of our invention are as follows:

The drive pinion being in mesh with the upper side of the rack 2, as shown in Figs. 2, 3 and 6, and power being applied to the power shaft 35 and said drive pinion being rotated clockwise, through the medium of said drive shaft, pinion 35, idler gear 36, drive gear 42 and pinion drive shaft 39, the rack bar I and cable are moved to the left by said pinion and rack, while the cable '74 is allowed to move to the left under the influence of the downward gravity stroke of the pump to which said cable is connected, until the drive pinion 4 enters 'the upper end of the guide I l, whereupon the pinion rollers 59 and til engage the guiding surfaces 55 and 66 respectively of said guide, and the drive pinion 4 is thereby guided downwardly around the right end of the rack 2 and guide bar I, until said pinion engages the lower side of said rack during which guided movement of said pinion the movement of the rack bar I to the left is brought to an end, said guided movement of the drive pinion 4 downwardly around the right end of the rack 2 and rack bar I being provided for by the cross head 38, and the floating idler gear 36, which cross head is moved downwardly by the downwardly moving pinion shaft 39, and which idler gear is swung downwardly and outwardly by the links M and 43,. the downward movement of the cross head 38 being controlled by the rotation of the pinions 45 and 41 in mesh with racks 49, the rotation of pinions 56 and 43 in mesh with racks 59, the rotation of the pinions 45 and 46 in mesh with each other, and the rotation of the pinions I! and 4B in mesh with each other, which pinions and racks cause the cross head 38 to move smoothly and in proper directional alignment and without tendency to cant and bind in View of the power being applied to only one side of the cross head by the idler 36. As the drive pinion 4, after being guided downwardly by the guide I I around the right end of the rack 2, engages the lower side of said rack, the rack bar I and cable 14 are moved to the right by said pinion and rack, while the cable I5 is allowed to move to the right under the influence of the downward gravity stroke of the pump to which said cable is connected, until the drive pinion 4 enters the lower end of the guide i3, whereupon the pinion rollers 59 and (ill engage the guiding surfaces 35 and 66 respectively of said guide, and the drive pinion 4 is thereby guided upwardly around the left end of the rack 2 and guide bar I until said pinion engages the upper side of said rack, during which guided movement of said pinion the movement of the rack bar I to the right is brought to an end; said guided movement of the drive pinion 4 upwardly around the left end of the rack 2 and rack bar I being provided for by the cross head 38 and floating idler gear 33, which cross head is moved upwardly by the upwardly moving pinion shaft 39, and which idler gear is swung upwardly and inwardly by the links 44 and 43, the upward movement of the cross head 38 being controlled by the rotation of the pinions 45 and 41 in mesh with racks 49, the rotation of the pinions 46 and 4B in mesh with racks 5%], the rotation of the pinions 45 and 46 in mesh with each other, and the rotation of the pinions 41 and 48 in mesh with each other. The drive pinion 4, being guided upwardly around the left end of the rack 2 and rack bar 5 and engaging the upper side of said rack, moves the rack bar I again to the left and the above described operations are repeated, thus reciprocating the rack i and the sucker rods of the pumps to which the cables 14 and 15 are connected.

As the rack bar I and rack 3 are reciprocated the gear 12 is oscillated by said rack, and the pull drum 6 is oscillated by said gear through the drive shaft II, so that thecables 1, 8 and 9, and any additional cables that may be secured to said pull drum, are alternately wound on said drum or unwound therefrom to reciprocate the sucker rods of the pumps to which said cables are connected.

We do not limit our invention to the exact construction herein disclosed since various changes may be made therein without departing from the spirit of the invention.

We claim:

1. A pumping power comprising a reciprocative rack bar formed with a rack extending along opposite sides and around the ends of said rack bar, a drive pinion in mesh with said rack, means for guiding said pinion around the ends of said rack and rack bar from one side thereof to the other for reciprocating said rack bar, a shaft on which said drive pinion is secured, means for rotating said pinion shaft to rotate said drive pinion to reciprocate said rack bar, a cross head in which said pinion shaft is journaled, pinions journaled in said cross head and racks with which said pinions mesh for controlling reciprocation of said cross head by said pinion shaft when said drive pinion is guided around the ends of said rack bar.

2. A pumping power comprising a reciprocative rack bar formed with a rack extending along opposite sides and around the ends of said rack bar, a drive pinion in mesh with said rack, means for guiding said pinion around the ends of said rack and rack bar from one side thereof to the other for reciprocating said rack bar, a shaft on which said drive pinion is secured, means for rotating said pinion shaft to rotate said drive pinion to reciprocate said rack bar, a cross head in which said pinion shaft is journaled, racks on opposite sides of said cross head, and intermeshing pinions journaled in said cross head in mesh with said racks respectively for controlling reciprocation of said cross head by said pinion shaft when said drive pinion is guided around the ends of said rack bar.

3. A pumping power comprising a reciprocative rack bar formed with a rack extending along opposite sides and around the ends of said rack bar, a drive pinion in mesh with said rack, means for guiding said pinion around the ends of said rack and rack bar from one side thereof to the other, for reciprocating said rack bar, a shaft on which said pinion is secured, a cross head in which said pinion shaft is journaled and which is reciprocated by said pinion shaft, when said pinion is guided around the ends of said rack bar, a drive gear secured on said pinion shaft, a pair of links mounted to turn about the axis of said pinion shaft, an idler shaft secured in said links, an idler turnable on said idler shaft and in mesh with said drive gear, a power shaft, a second pair of links turnably hung at their ends on said power shaft and said idler shaft respectively, and a pinion on said power shaft in mesh with said idler.

4. A pumping power comprising a reciprocative rack bar formed with a rack extending along opposite sides and around the ends of said rack bar, a drive pinion in mesh with said rack, means for guiding said pinion around the ends of said rack and rack bar from one side thereof to the other for reciprocating said rack bar, a shaft on which said drive pinion is secured, means for rotating said pinion shaft to rotate said drive pinion to reciprocate said rack bar, a pair of spaced racks on each of two opposite sides of said cross head, two pairs of intermeshing pinions journaled in said cross head above said pinion shaft in mesh with said racks respectively, and two pairs of in termeshing pinions journaled in said cross head below said pinion shaft in mesh with said racks respectively for controlling reciprocation of said cross head bysaid pinion shaft, when said drive pinion is guided around the ends of said rack bar.

ROY E. LEONARD. HARRY GEARING. 

